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Interactive video lesson
plan for: area of rectangles using sums and differences (KristaKingMath)

Activity overview:

► My Geometry course: https://www.kristakingmath.com/geometry-course

In this video we'll learn how to find the area of a figure that's the compilation of multiple rectangles, by finding the area of the larger rectangle and subtracting out part of the area, or by finding the areas of the smaller rectangles and then adding them together.

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If you could use some extra help with your math class, then check out Krista’s website // http://www.kristakingmath.com

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Hi, I’m Krista! I make math courses to keep you from banging your head against the wall. ;)

Math class was always so frustrating for me. I’d go to a class, spend hours on homework, and three days later have an “Ah-ha!” moment about how the problems worked that could have slashed my homework time in half. I’d think, “WHY didn’t my teacher just tell me this in the first place?!”

So I started tutoring to keep other people out of the same aggravating, time-sucking cycle. Since then, I’ve recorded tons of videos and written out cheat-sheet style notes and formula sheets to help every math student—from basic middle school classes to advanced college calculus—figure out what’s going on, understand the important concepts, and pass their classes, once and for all. Interested in getting help? Learn more here: http://www.kristakingmath.com